Shuttle



Feb. 24, 1953 Filed July 13, 1950 A. CROES SHUTTLE 2 SHEETSSHEET l INVENTOR. L ARTHUR CROES Y ig/Z2? Feb. 24, 1953 A. CROES 2,629,406

SHUTTLE Filed July 15, 1950 2 SHEETS-SI-IEET 2 IN VENTOR. ARTHUR CROESPatented Feb. 24, 1953 SHUTTLE Arthur Croes, Lawrence, Mass., assignorto Pacific Mills, Lawrence, Mass., a corporation of MassachusettsApplication July 13, 1950, Serial No. 173,606

1 Claim. 1

This invention relate to an improved shuttle and its object is toeliminate the carrying of loose pieces and ends of thread into the clothwhich would produce defects in the cloth.

With a shuttle which contains a bobbin, such as in the automatic bobbinchanging loom, the thread on the bobbin is exhausted until there areonly a few turns of thread on thebobbin. The filling detector feels thisdeficiency of thread on the bobbin and sets in operation mechanism whichcauses a transfer of a fresh bobbin into the shuttle which drives outthe spent bobbin from the shuttle, all as is well known in the art.

When the transfer takes place, with the shuttle in the right-hand box,i. e. on the bobbin transfer side of the loom, then a piece of threadfrom the spent shuttle may lie on the lay from the shuttle eye to thefront part of the shuttle box, and will roll under the front part of theshuttle. When the transfer takes place, the pressure on the shuttletraps this piece of filling thus preventing it from following theexhausted bobbin. The shuttle then carries the short piece of fillinginto the cloth to cause the defect known a a flyer. This happens quitefrequently and the weaver watches for it, and when a flyer is formed inthe cloth, he is supposed to see it and pull it out. But if he fails todo this, the flyer causes a defect in the cloth.

Just before the bobbin is charged, the detector feels the lack of threadon the bobbin and causes the operation of mechanism which lift up thethread holder and cutter so that as the lay beats up, the thread fromthe spent bobbin should enter the jaws of the thread holder and cutterand be thereby out. Then a second cutter near the selvage of the clothis operated by the impact of the lay to out the thread close to theselvage. The holder holds the filling until this second cutter cuts it.But if the thread from the spent shuttle is slack. it may drop down ontothe lay and out of position so that it will not enter the cutting jawsof the holder and cutter and not be cut or seized by the holder. Then,the transfer having taken place, the spent bobbin falls down and in sodoing breaks the thread leaving a part of it lying on the lay and partin the shuttle. The picked shuttle carries the piece of filling into thecloth to cause a so-called filling runner.

Another cause of defects in the cloth is due to the rebound of theshuttle, even slightly, in the right-hand. box. This causes the threadto be come slack between the shuttle eye and the se1- vage and the slackmay fall down on the lay. Then, as the shuttle is picked from right toleft, the thread may get under the left-hand bottom of the shuttle,which cuts the thread and is the cause of broken picks, and much loss oftime in efforts by the loom fixer to correct the condition.

In accordance with my invention the shuttle is equipped with a staticinsert made of hard rubber or other suitable material on the side of theshuttle remote from its eye. I have discovered that this insert becomescharged with static electricity as the shuttle is picked across theloom.

The result is that when there is a thread which lies against the side ofthe shuttle from its eye to the other end of the shuttle, as it boxes onthe right-hand side, this "thread is held against the static insert bythe effect of the static electricity, and is thereby prevented fromfalling down onto the lay between the static insert and the eye at theright-hand end of the shuttle. Such lit-tle slack. as there may bebetween the static insert and the selvageis so small that it can do noharm.- The thread cannot get under the bottom of the shuttle at itsleft-hand end.

Consequently, by my'invention the thread is held up between the staticinsertand the selvage so that the thread enters the jaws of the threadholder and cutter as the lay beats up and i cut at that point.

When the fresh bobbin is inserted, the static insert still holds thethread and as the spent bobbin is forced down and out of the shuttle,the thread is stripped oil the static insert and is carried away withthe spent bobbin.

In the drawings,

Fig. 1 is an elevation of the lay with the shuttle in the right-handbox;

Fig. 2 is a plan view of the same;

Fig. 3 is an elevation and cross section of a. part of the lay with theshuttle in the right-hand box;

Fig. 4 is a side view of the shuttle with the thread extending from itseye at the right-hand end to the left-hand end;

Fig. 5 is a cross section of the shuttle on the line 55 of Fig. 4;

Fig. 6 is a perspective view of a static insert;

Fig. '7 is a view of the left-hand end of the shuttle with another formof a static insert and Fig. 8 is a plan view of the right-hand end ofthe lay with the shuttle in the box.

The loom is an automatic bobbin changing loom of a well known type.

When, during the operation of the loom, the

detector (not shown) of a well known type detects the almost completeabsence of filling on the bobbin, well known mechanism is set intooperation to force a fresh bobbin down into the shuttle on top of thespent bobbin and eject the latter down and out of the shuttle and at thesame time cause the operation of mechanism which moves the thread holderand cutter A from its dotted line position to its full line position,Fig. 3. In normal operation the thread T from the shuttle lies in astraight line from. the shuttle eye to the selvage of the cloth and inthis position it lies opposite the jaws of the holder and cutter A. Thenas the lay L beats up, it strikes a projection B on one of the cutterblades thereby perating it to cut the thread which has been broughtbetween those blades by the beat up of the lay in the direction of thearrow, Fig. 3, and to hold the cut end of the part which is woven intothe cloth. To the left of the holder and cutter A is another threadcutter D shown in Fig. 8 which cuts the thread close to the selvage whenthe thread holder and cutter A returns to its dotted line position, Fig.3. These parts are all well known in the art and need no furtherdescription.

As above stated, I have found that as the shuttle is picked from side toside, a charge of static electricity is created on the static insert sothat, when the shuttle enters the right-hand box, this charge causes thethread T'to be held against the static insert in the wall of the shuttlethereby holding the thread up from the static insert to the selvage ofthe cloth and also from the static insert to the eye of the shuttle.Thus when the filling detector has called for a change of bobbin andlifted the thread holder and cutter A to its full line position, theeffect of the static insert in holding the thread up assures that thethread will be carried into the jaws of the thread holder and cutter bythe forward movement of the lay and properly held and cut by holder andcutter A and cutter D.

When the spent bobbin is ejected from the shuttle, it carries its end ofthe thread with it so that there is no danger of this part of the threadbeing carried back into the cloth.

Because the thread is held against the static insert by the electriccharge therein, the possibilities of the other end of the thread beingcarried into the cloth and causing defects therein are eliminatedbecause,

(1) When the transfer of bobbin takes place the piece of thread from thespent bobbin and extending out of the shuttle eye is held up above thelay and is cut by the holder and cutter A and the end from the spentbobbin is carried away as that bobbin drops down and the holder andcutter is swung down to the dotted line position, Fig. 3, therebycarrying the thread which extends from the holder and cutter to theselvage into the jaws. of the cutter D.

(2) If the shuttle should rebound in the righthand box, the slack of thethread is held up above the lay by the static insert and there is noopportunity for the shuttle to carry the thread into the cloth.

The static insert may be made of any suitable material which will becharged with static electricity by the picking of the shuttle. I havefound that a piece of hard rubber operates well and performs thedescribed functions. The insert need not be made in one piece as shownin Fig. 6, but it might be made of several pieces circular in. form asshown in Fig. 7 or of other shapes.

I claim:

A loom shuttle having in its side near its end remote from itseye aninsert of material capable of being charged with static electricity asthe shuttle is thrown across the loom, said insert being surrounded onthe exposed face of the shuttle by material substantially less capableof acquiring a static electric charge.

ARTHUR CROES.

REFERENCES CITED The following references are of record in the file or"this patent:

UNITED STATES PATENTS Number Name Date 22,221 Willis Nov. 30, 1858514,232 Kobertz Feb. 6, 1894

